Claims
- 1. A Discrete Multi-Tone (DMT) device which comprises:(a) a frequency domain equalizer having variable coefficients for flattening a converted digital signal, said frequency domain equalizer comprising a gain corrector coupled to a Fast Fourish Transform (FFT) to compensate the channel frequency rolloff and make tones approximately the same amplitude before phase rotation and a phase rotator portion responsive to the output of said gain corrector to track small channel variation; and (b) circuitry for updating the coefficients of said frequency domain equalizer.
- 2. The device of claim 1 further including a slicer for controlling said frequency domain equalizer by feeding back an error signal thereto.
- 3. The device of claim 2 wherein said error signal is fed back to said phase rotator portion of said frequency domain equalizer.
- 4. The device of claim 3 wherein said device is a DMT receiver and further includes:(c) an analog front end for receiving an analog signal; (d) a converter for converting said analog signal to a digital signal; (e) a FFT for converting said digital signal from the time domain to the frequency domain and feeding said digital signal to said frequency domain equalizer.
- 5. The device of claim 2 wherein said device is a DMT receiver and further includes:(c) an analog front end for receiving an analog signal; (d) a converter for converting said analog signal to a digital signal; (e) a FFT for converting said digital signal from the time domain to the frequency domain and feeding said digital signal to said frequency domain equalizer.
- 6. The device of claim 1 wherein said device is a DMT receiver and further includes:(c) an analog front end for receiving an analog signal; (d) a converter for converting said analog signal to a digital signal; (e) a FFT for converting said digital signal from the time domain to the frequency domain and feeding said digital signal to said frequency domain equalizer.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority under 35 U.S.C. §119(e)(1) of provisional applications Serial No. 60/050,707, filed Jun. 25, 1997 and Serial No. 60/050,753, filed Jun. 25, 1997, the entireties of which are incorporated herein by reference.
US Referenced Citations (6)
Provisional Applications (2)
|
Number |
Date |
Country |
|
60/050707 |
Jun 1997 |
US |
|
60/050753 |
Jun 1997 |
US |